As a result of my tests, I determined that these 90 degree router bits by Whiteside are the perfect addition to any woodworker's toolkit .The industrial and scientific design ensures a SHARP and precise cut leaving a clean edge on the wood. The only downside is that they are a bit pricier compared to other router bits in the market. Overall, Whiteside Router Bits 1504 90 Degrees are a great investment for anyone looking for top-notch cutting tools..